Dark Star — Don Pendleton

Hidden deep within the U.S. government, one special operations group is America's best chance to combat strategic terror. Covert, uncensored and answering only to the President, the cybernetic and commando teams of Stony Man understand that the impossible can be done, with the right people, the right plan, a little luck--and the courage to attempt what no one else dares.

Skywalker

A machine that defies logistics has become a grim reality. A working SSO--single-stage-to-orbit rocket, or X-ship--can launch and land anywhere, virtually unseen and unstoppable due to stealth technology and sheer velocity. Now a faceless enemy with a hidden agenda is using X-ships to spread global fire and death like a tidal wave from hell. Facing a crisis of unimagined proportions, Stony Man is once again tasked with the impossible: unmask the masterminds behind the attacks and take them out--fast.